import buildURL from '../helpers/buildURL'
import buildFullPath from '../core/buildFullPath'
import settle from '../core/settle'
import {
	isUndefined
} from "../utils"

/**
 * 返回可选值存在的配置
 * @param {Array} keys - 可选值数组
 * @param {Object} config2 - 配置
 * @return {{}} - 存在的配置项
 */
const mergeKeys = (keys, config2) => {
	let config = {}
	keys.forEach(prop => {
		if (!isUndefined(config2[prop])) {
			config[prop] = config2[prop]
		}
	})
	return config
}
export default (config) => {
	return new Promise((resolve, reject) => {
		let fullPath = buildURL(buildFullPath(config.baseURL, config.url), config.params)
		const _config = {
			url: fullPath,
			header: config.header,
			complete: (response) => {
				config.fullPath = fullPath
				response.config = config
				try {
					// 对可能字符串不是json 的情况容错
					if (typeof response.data === 'string') {
						response.data = JSON.parse(response.data)
					}
					// eslint-disable-next-line no-empty
				} catch (e) {}
				settle(resolve, reject, response)
			}
		}
		let requestTask
		if (config.method === 'UPLOAD') {
			delete _config.header['content-type']
			delete _config.header['Content-Type']
			let otherConfig = {
				// #ifdef MP-ALIPAY
				fileType: config.fileType,
				// #endif
				filePath: config.filePath,
				name: config.name
			}
			const optionalKeys = [
				// #ifdef APP-PLUS || H5
				'files',
				// #endif
				// #ifdef H5
				'file',
				// #endif
				// #ifdef H5 || APP-PLUS
				'timeout',
				// #endif
				'formData'
			]
			requestTask = uni.uploadFile({
				..._config,
				...otherConfig,
				...mergeKeys(optionalKeys, config)
			})
		} else if (config.method === 'DOWNLOAD') {
			// #ifdef H5 || APP-PLUS
			if (!isUndefined(config['timeout'])) {
				_config['timeout'] = config['timeout']
			}
			// #endif
			requestTask = uni.downloadFile(_config)
		} else {
			const optionalKeys = [
				'data',
				'method',
				// #ifdef H5 || APP-PLUS || MP-ALIPAY || MP-WEIXIN
				'timeout',
				// #endif
				'dataType',
				// #ifndef MP-ALIPAY
				'responseType',
				// #endif
				// #ifdef APP-PLUS
				'sslVerify',
				// #endif
				// #ifdef H5
				'withCredentials',
				// #endif
				// #ifdef APP-PLUS
				'firstIpv4',
				// #endif
			]
			requestTask = uni.request({
				..._config,
				...mergeKeys(optionalKeys, config)
			})
		}
		if (config.getTask) {
			config.getTask(requestTask, config)
		}
	})
}
